docs: def get_success_url(self):
          """ Returns the URL to redirect the user to upon valid form processing. """
          return '{0}?post={1}#{1}'.format(
              reverse(
                  'forum_conversation:topic',
                  kwargs={
                      'forum_slug': self.forum_post.topic.forum.slug,
                      'forum_pk': self.forum_post.topic.forum.pk,
                      'slug': self.forum_post.topic.slug,
                      'pk': self.forum_post.topic.pk,
                  },
              ),
              self.forum_post.pk,
          )